If you have been able to catch the disease in its earliest stages, there will come a time after 12 to 18 months (if you’re very fortunate) when the positive impact of steriods will have run their course. The fibrosis will have taken a real hold of your Westies’ lungs and they will have been fighting it off for as long as they can. The three clips of Harry above illustrate this perfectly. Normally by this stage it will be becoming too much for your beloved pet to bear not to mention yourself having to see your pet go through this. They will be starting to gasp for air at this stage and their tongue and gums will be more blue than the rich pink colour you’ve been used to seeing.